How to style it? Well, it absolutely depends on you, I think you'll never be wrong. Me personally like to combine shorts and longer jackets, cardigans or coats because the length contrast looks very interesting. A cute styling can be created when matching together an oversized coat and shorts. Of course, because days get colder in autumn season, tights are necessary. And as for shoes, I prefer ankle boots :)
I often mention denim in my posts because denim is classic and for me it's a real must-have. When talking about shorts, I can't forget the denim shorts - you can wear it all the year long in various ways and it can look absolutely fabulous. I love to wear it with leather jackets, chiffon shirt and ankle boots or even oxford shoes accessorized f. e. with a big colorful pashmina or with a hat. Another way I style it is together with long oversized cardigan and some interesting belt.
But shorts are not only denim shorts and we can choose from many materials typical for autumn season - such as tweed. It's warm, so you will feel comfortable even in Winter.
Tweed shorts are a classic and there are many many ways how to wear it. There are some tips I picked for you just for inspiration.
And some more inspo...
As for materials, the third classic I would like to mention is leather. Leather shorts are great to wear in Autumn and, again, it is pretty easy to style it, to accessorize it and to create a wonderful outfit. You can choose a classic black leather shorts of many cuts...
But very good looking is also brown leather, especially in Fall...